Sorption Recovery of Platinum (IV) from Hydrochloric Acidic Solutions in Presence of Iron (III), Copper (II) and Zinc

The present work is devoted to sorption preconcentration of platinum (II,IV) in the presence of iron (III), copper (II) and zinc from chloride solutions on the samples of CYBBER – new Russian brand of ion exchangers. The initial concentrations of platinum, iron and non-ferrous metal ions were 0.25, 0.5 and 2.0 mmol/L, respectively. The acidity of the investigated solutions was 0.01 – 2 mol/L. It was shown that the ion exchangers possess high sorption ability to the noble metal ions, and allow the quantitative recovery of these ions. It was also found out that platinum can be isolated from the accompanying components by means of separate elution with 0.001 M HCl (iron ions), 0.5 M HNO 3 (non-ferrous metal ions) and thiourea solution (80 g/L) in 0.3 M H 2 SO 4 (platinum ions).